Re: [Classpath] Bug in Double.java

From:

C. Scott Ananian

Subject:

Re: [Classpath] Bug in Double.java

Date:

Mon, 16 Jul 2001 11:14:29 -0400 (EDT)

On Mon, 16 Jul 2001, Eric Blake wrote:
> Someone will need to check my work with serialization issues, as I am not
> very familiar with the process. Basically, my added hashCode() caching will
> break if a deserialization restores the transient hashCode field to 0
> instead of -1. I chose -1 for the non-cached value instead of 0, since new
> Double(0).hashCode() == 0, but left the cache field transient so it will
> interoperate with serial streams from other sources. Maybe it's not worth
> caching the result of hashCode() after all.
Fields marked transient are *defined* to be reset to zero after
deserialization. Use 0 as your non-cached value; the only "harm" will be
that hashCode will have the same performance as the non-caching version
for Double(0) -- it's still better than not caching at all.
--s
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